看看我的程序：ADO+存储过程

Question

int ProcessSQLSERVER_sp(CString server,CString db,CString UserName,CString Pwd)
{ int IRet;
int id = 1;
piConnection.CreateInstance("ADODB.Connection");
CString strCn;
strCn.Empty();
strCn="provider=SQLOLEDB;data source="+server
 +";initial catalog="+db
 +";userID="+UserName
 +";Password="+Pwd;
_variant_t bcnstr=_variant_t(strCn);
_variant_t bunstr=_variant_t(UserName);
_variant_t bpwdstr=_variant_t(Pwd);
//打开一个连接
try{
piConnection->Open(_bstr_t(bcnstr),_bstr_t(bunstr),
_bstr_t(bpwdstr),-1); //adOpenUnspecified }catch(CDBException *ce)
{
ce->m_strError;
addlog(ce->m_strError);
ce->Delete();
return -1;
}
_CommandPtr cmd;
cmd.CreateInstance("ADODB.Command");
//id号
_ParameterPtr pParamRk;
pParamRk.CreateInstance("ADODB.Parameter");
pParamRk->Name="orderno"; //存储过程的参数1
pParamRk->Type=adInteger; //整型
pParamRk->Size=2; //
pParamRk->Direction=adParamInput;//表明是输入参数
CString tstr;
tstr.Format("%d",id);
pParamRk->Value=_variant_t(tstr);//int->CString->_variant_t后赋值
cmd->Parameters->Append(pParamRk);

_ParameterPtr pParamRET;
pParamRET.CreateInstance("ADODB.Parameter");
pParamRET->Name="amount"; //存储过程的参数1
pParamRET->Type=adInteger; //整型
pParamRET->Size=2; //
pParamRET->Direction=adParamInput;//表明是输入参数
// CString tstr;
tstr.Format("%d",id + 5);
pParamRET->Value=_variant_t(tstr);//int->CString->_variant_t后赋值
cmd->Parameters->Append(pParamRET); //返回值
_ParameterPtr pParamOk;
pParamOk.CreateInstance("ADODB.Parameter");
pParamOk->Name="result"; //参数2名称
// pParamOk->Type=adChar; //字符串
// pParamOk->Size=20; //大小为20个字节
pParamOk->Type = adInteger;
pParamOk->Size = 2;
pParamOk->Direction=adParamReturnValue; //声明是输出参数
cmd->Parameters->Append(pParamOk);
//_variant_t TheValue = MySet->GetCollect("FIELD_1");  
//CString sValue=(char*)_bstr_t(TheValue);  cmd->ActiveConnection = piConnection;
cmd->CommandText="dbo.add168member"; //存储过程的名字
cmd->CommandType=adCmdStoredProc; //表示为存储过程adCmdStoredProc
    //执行,获得结果
try{
cmd->Execute(NULL, NULL, adCmdStoredProc);//Exception
}catch(CDBException *ce)
{
ce->m_strError;
addlog(ce->m_strError);
ce->Delete();
return -1;
}
    //将值返回
// return (char*)_bstr_t(pParamOk->Value); ///output values
IRet = atoi((char*)_bstr_t(pParamOk->Value));
if(piConnection!=NULL)
{
piConnection->Close();//关闭连接
piConnection.Release();//释放对象
}
return 0;
}
STORED PROCEDURE：
CREATE PROCEDURE dbo.add168member
    @orderno int,
    @amount  int
 as
declare @result int
set nocount onset @result = @orderno + @amountreturn @result问题：在执行cmd->Execute(NULL, NULL, adCmdStoredProc);的时候出错：
First-chance exception in Gate168.exe (KERNEL32.DLL): 0xE06D7363: Microsoft C++ Exception.

Answer 1

看一下piConnection->Open(_bstr_t(bcnstr),_bstr_t(bunstr),
_bstr_t(bpwdstr),-1);
的返回值。确定有没有出错先

Answer 2

piConnection = 0x00fa0e98
而且没有报错啊

Answer 3

可能是provider的问题
在open connection之前加上
piConnection->CursorLocation = adUseClient;
piConnection->Provider = _bstr_t(L"MSDAORA");
试一下再。

Answer 4

这下好了
一次出来2个EXCEPTION：
Loaded 'D:\Program Files\Common Files\System\msadc\msadcer.dll', no matching symbolic information found.
First-chance exception in Gate168.exe (KERNEL32.DLL): 0xE06D7363: Microsoft C++ Exception.
First-chance exception in Gate168.exe (KERNEL32.DLL): 0xE06D7363: Microsoft C++ Exception.
TRY是无法捕捉的

Answer 5

// SQL Server, stored procedure , Command , Recordset, input parameter, output parameter, returned recordset from stored procedure
//execute stored procedure , get returned value, output value, and returned recordset.
#include "stdafx.h"
#import "C:\PROGRA~1\COMMON~1\System\ado\msado15.dll" rename( "EOF", "adoEOF" )
  struct InitOle
  {
    InitOle()  { ::CoInitialize(NULL); }
    ~InitOle() { ::CoUninitialize();  }
  } _init_InitOle_;
void PrintProviderError(ADODB::_ConnectionPtr pConnection);int main(int argc, char* argv[])
{
        printf("Create a adParamReturnValue for Command object to get return value of stored procedure\n");
        printf("Reference :MSDN---Append and CreateParameter Methods Example (VC++)\n");
        ADODB::_ConnectionPtr  Conn1;
        ADODB::_CommandPtr    Cmd1;
        ADODB::_RecordsetPtr  Rs1;
        ADODB::_ParameterPtr  retParam= NULL;
        ADODB::_ParameterPtr inParam=NULL;
        ADODB::_ParameterPtr outParam=NULL;
        _variant_t  vtEmpty (DISP_E_PARAMNOTFOUND, VT_ERROR);
        _variant_t  vtEmpty2 (DISP_E_PARAMNOTFOUND, VT_ERROR);
        _bstr_t    bstrConnect( L"driver={sql server};server=Cell;Database=zhg;UID=sa;PWD=;" );
        // the following stored procedure return 12345 int value
        _bstr_t    bstrCreate ( L"create proc sp_AdoTest( @OutParam int OUTPUT,@InParam int ) "
                L"as "
                L"select @OutParam = @InParam + 10 "
                L"select * from Table1"
                L"return 12345" );
        _bstr_t    bstrSP(L"sp_Adotest" );
        try
        {
                _bstr_t bstrEmpty;
                Conn1.CreateInstance( __uuidof( ADODB::Connection ) );
                Cmd1.CreateInstance( __uuidof( ADODB::Command ) );
                Rs1.CreateInstance(__uuidof(ADODB::Recordset));
                // Establish connection.
                Conn1->ConnectionString = bstrConnect;
                Conn1->Open( bstrConnect, bstrEmpty, bstrEmpty, -1 );
                // Open recordset.
                Cmd1->ActiveConnection = Conn1;
                Cmd1->CommandText      = bstrSP;
                Cmd1->CommandType      = ADODB::adCmdStoredProc;
                retParam=Cmd1->CreateParameter(_bstr_t("Return"),ADODB::adInteger,ADODB::adParamReturnValue,sizeof(int));
                Cmd1->Parameters->Append(retParam);
                outParam = Cmd1->CreateParameter(_bstr_t("OutParam"),ADODB::adInteger,ADODB::adParamOutput,sizeof(int));
                Cmd1->Parameters->Append(outParam);
                inParam = Cmd1->CreateParameter(_bstr_t("InParam"),ADODB::adInteger,ADODB::adParamInput,sizeof(int),_variant_t( (long) 10 ));
                inParam->Value=_variant_t( (long) 10 );
                Cmd1->Parameters->Append(inParam);
                Cmd1->Parameters->Refresh();
                Cmd1->Parameters->Item[ _variant_t( _bstr_t("@InParam") ) ]->Value =_variant_t( (long) 11 );
                Rs1->put_CursorLocation(ADODB::adUseClient);
                Rs1->Open((_variant_t((IDispatch *) Cmd1)),vtEmpty,ADODB::adOpenStatic,
                        ADODB::adLockReadOnly, -1);
                // Get return value of the stored procedure.adCmdUnknown
                TCHAR tcbuf[1024];
                long retvalue=Cmd1->Parameters->Item[(short)0]->Value;
                long p2=Cmd1->Parameters->Item[(short)1]->Value;
                long p3=Cmd1->Parameters->Item[(short)2]->Value;
                int recordcount=0;
                if(Rs1->State==ADODB::adStateClosed)
                        MessageBox(NULL,"no recordset is returned from the stored procedure","Information",MB_OK);
                else
                        recordcount = Rs1->GetRecordCount();
                wsprintf(tcbuf,"retvalue of the stored procedure:%d,input value:%d,output value:%d,record count :%d",retvalue,p2,p3,recordcount);
                MessageBox(NULL,tcbuf,"Output",MB_OK);
        }
  catch(_com_error &e)
  {
      _bstr_t bstrSource(e.Source());
      _bstr_t bstrDescription(e.Description());
      printf("\nCOM error occurred, Source : %s \n Description : %s \n",(LPCSTR)bstrSource,(LPCSTR)bstrDescription);
    PrintProviderError(Conn1);
  }
        return 0;
}
VOID PrintProviderError(ADODB::_ConnectionPtr pConnection)
{
  // Print Provider Errors from Connection object.
  // pErr is a record object in the Connection's Error collection.
        ADODB::ErrorPtr  pErr = NULL;
  long      nCount = 0;
  long      i = 0;  if( (pConnection->Errors->Count) > 0)
  {
      nCount = pConnection->Errors->Count;
      // Collection ranges from 0 to nCount -1.
      for(i = 0; i < nCount; i++)
      {
        pErr = pConnection->Errors->GetItem(i);
        printf("\n\t Error number: %x\t%s", pErr->Number, (LPCSTR)pErr->Description);
      }
  }
}

Answer 6

但是我把代码放到我的工程里面，却莫名其妙的出错，
说namespace adodb 没有找到
msado15.dll是明明包含进去了的

Answer 7

#import "msado20.tlb" rename( "EOF", "adoEOF" )

Answer 8

~o!The sample is come from MSDN.